package com.lagou.rpc.provider.server;

import com.lagou.rpc.provider.handler.RpcServerHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class RpcServer implements DisposableBean {

    private NioEventLoopGroup bossGroup;

    private NioEventLoopGroup workerGroup;

    @Autowired
    private RpcServerHandler rpcServerHandler;

    public void startServer(String ip,int port){
        try {
        //1.创建线程组
        bossGroup=new NioEventLoopGroup(1);
        workerGroup=new NioEventLoopGroup();
        //2. 创建服务启动助手
        ServerBootstrap serverBootstrap=new ServerBootstrap();
        //3.设置参数
        serverBootstrap.group(bossGroup,workerGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel channel) throws Exception {
                        ChannelPipeline pipeline = channel.pipeline();
                        pipeline.addLast(new StringEncoder());
                        pipeline.addLast(new StringDecoder());
                        //业务处理类
                        pipeline.addLast(rpcServerHandler);

                    }
                });
            //4.b绑定端口
            ChannelFuture future = serverBootstrap.bind(ip, port).sync();
            System.out.printf("=======服务端启动成功=====");
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally {
            if(bossGroup!=null){
                bossGroup.shutdownGracefully();
            }
            if(workerGroup!=null){
                workerGroup.shutdownGracefully();
            }
        }

    }


    @Override
    public void destroy() throws Exception {
        if(bossGroup!=null){
            bossGroup.shutdownGracefully();
        }
        if(workerGroup!=null){
            workerGroup.shutdownGracefully();
        }
    }
}
